A multi-channel broadband amplitude and phase calibration device for satellite communication
A satellite communication and calibration device technology, applied in the field of signal processing, can solve problems such as low precision and complicated operation, and achieve the effects of high precision, strong adaptability and reduced complexity
Active Publication Date: 2022-07-08
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology
When the phased array antenna works in different frequency ranges, in order to ensure the accuracy of the amplitude and phase calibration, it needs to be recalibrated and the accuracy is low
In addition, the traditional transmission channel calibration requires external connections for auxiliary testing. Each transmission channel is connected to a receiving channel, and multiple signals are simultaneously transmitted and looped back to test the amplitude and phase errors of the entire loop. Finally, according to the entire loop The amplitude and phase error of the receiving channel and the amplitude and phase error of the receiving channel are used to calculate the amplitude and phase error information of the transmitting channel, and the operation is complicated
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[0022] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] refer to Figure 1 to Figure 3 , a multi-channel broadband amplitude and phase calibration device for satellite communication, which includes an ARM controller, a multiplexer, a power supply processing module, an equalization module, an amplitude and phase error calculation module and a plurality of TR components. The module is connected with the equalization module, each TR component is connected with the equalization module through an up-conversion path and a first down-conversion path, and each first down-conversion path is also connected with the amplitude-phase error calculation module; The TR component is also connected to the multiplexer, and the multiplexer is connected to the amplitude-phase error calculation module through a second down-conversion path; each down-conversion path includes an an...
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The invention discloses a multi-channel broadband amplitude and phase calibration device for satellite communication, which belongs to the technical field of signal processing. It includes a controller, a power processing module, a multiplexer, an equalization module, an amplitude-phase error calculation module, and multiple TR components. The amplitude-phase error calculation module is connected to the equalization module, and each TR component is connected through an up-conversion channel and a The down-conversion channel is connected to the equalization module, and each down-conversion channel is also connected to the amplitude-phase error calculation module; in addition, each TR component is also connected to a multiplexer, and the multiplexer is connected to the amplitude-phase error calculation module through a down-conversion channel . Compared with the commonly used single tone signal calibration, the invention adopts the calibration algorithm based on the broadband linear frequency modulation signal, and can conveniently realize the wideband and multi-channel amplitude and phase error calibration function in the digital domain, and has the advantages of high integration degree, simple structure and reliability. It has the characteristics of high performance and convenient scale expansion.
Description
technical field [0001] The invention belongs to the field of digital phased array antenna array signal processing and satellite communication signal processing, in particular to a multi-channel broadband amplitude and phase calibration device for satellite communication. Background technique [0002] Active phased array antennas have been widely used in recent years due to their advantages of small size, low loss, low profile, easy to achieve beam nulling, beamforming, multi-beam, and agile adjustment of beam pointing. However, due to various factors such as device inconsistency and environmental changes, phased array antennas may have large amplitude and phase errors, resulting in reduced gain and increased side lobes. Therefore, it is necessary to have the function of self-calibration of the receiving and transmitting channels. The traditional transceiver channel calibration method generally adopts the method of transmitting and receiving single-frequency signals for calib...
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IPC IPC(8): H04B7/005H04B7/185H04B17/11H04B17/21
CPCH04B17/11H04B17/21H04B7/005H04B7/1851Y02D30/70
Inventor 冯世强李靖刘彦刚智开宇杨华裕齐志刚申昱东
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP